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IB
A.3.3 Power and efficiency

A.1 Kinematics

A.2 Forces and momentum

A.3 Work, energy and power

A.4 Rigid body mechanics (HL only)

A.5 Galilean and special relativity (HL only)

B.1 Thermal energy transfers

B.2 Greenhouse effect

B.3 Gas laws

B.4 Thermodynamics (HL only)

B.5 Current and circuits

C.1 Simple harmonic motion

C.2 Wave model

C.3 Wave phenomena

C.4 Standing waves and resonance

C.5 Doppler effect

D.1 Gravitational fields

D.2 Electric and magnetic fields

D.3 Motion in electromagnetic fields

D.4 Induction (HL only)

E.1 Structure of the atom

E.2 Quantum physics (HL only)

E.3 Radioactive decay

E.4 Fission

E.5 Fusion and stars

IB Physics A.3.3 Power and Efficiency Key Definitions

A.3.3 Power and efficiency Key Definitions

Definition

Efficiency

Efficiency quantifies how effectively a system converts input energy into useful output energy.

Definition

Energy density

Energy density is defined as the amount of energy stored per unit volume or mass of a substance.

Definition

Power

Power is the rate at which energy is transferred or converted.

Key Definitions